Pathetic service

I ordered Flowers on 2 occasions in 2 months. Both times on the day of delivery i get a call to say that they do not have it in stock but they can send other flowers. Why do i pay for something if i don't get what i paid for? They had 3 days from payment to delivery to inform me. How is a R150 voucher supposed to help for the inconvenience when i already spend R1800 for something i did not choose?